mrhelio

At anything above 10,000 feet 310 HP will be the magic number, less than that you the inefficiency of the smaller compressor in the Allison B-17F. They claim 19.5 GPH @ 310 HP figure that should give you 5 hours endurance!!

mrhelio

There are no H500 twins, but someone is reported to have parts of one. Only seven built for the CIA, 6 went to India and from there to China back in 1960. They were built for one way missions into Soviet Union. The military designation was U-5, U-5A/B

mrhelio

Apparently the photo gallery has not been initiated as of yet, I have the same issues. As I mentioned earlier, Samuel Stainton is the only source I know of that can give you what you need for flight training, he is in Colorado.. I don't think he is current in his own airplane at the moment, but if you had an airplane we could do that fairly soon. I'm thinking because of your age that will be awhile off yet. For a complex airplane that the Helio is, figure on 150 hours for insurance purposes and to be good at it, if I find more resources I will let you know..